Beth earns $54 per day and $10 for each extra hour she works. ray earns $60 per day and $8 for each extra hour he puts in. they both work five days a week. the equations show their weekly earnings with respect to how many extra hours they work. beth: y = 270 + 10x ray: y = 300 + 8x the point of intersection of the two lines is . at this point, beth’s earnings will be ray’s earnings, and beth would have put in ray.

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.